Preparation method of anhydrous sodium sulphate based on combination of salt lake ore, lithium polymer and spodumene

Abstract

The invention discloses a preparation method of anhydrous sodium sulphate based on combination of salt lake ore, a lithium polymer and spodumene, and belongs to the technical field of preparation of anhydrous sodium sulphate; spodumene and a lithium polymer are mixed and then subjected to calcination, cooling, fine grinding, acid adding reaction, cooling, size mixing, leaching, filtering and washing, salt lake ore adding, purifying, causticizing, freezing and crystallizing, mirabilite dissolving, evaporating and concentrating, centrifugally separating, drying and crushing by air flow in sequenceto obtain the anhydrous sodium sulphate. The content of salt lake ore Li2SO4.H2O reaches 80.1%-92.1%, the average content is 85.1%, the lithium polymer grade reaches 8.5%-12% (Li2O), the Al content is 25.05%, the Mg content is 1.23%, the Si content is 0.84%, the Mn content is 0.69%, the salt lake ore Li2SO4.H2O and the lithium polymer grade are mixed with the spodumene, high-quality anhydrous sodium sulphate can be produced, sodium sulfate is separated out through a continuous freezing crystallization technology, stable growth of crystal nucleuses and production continuity are guaranteed, high-quality products can be produced, meanwhile, the production period is shortened, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of sodium sulfate preparation, and in particular relates to a method for preparing sodium sulfate based on a combination of salt lake ore, lithium polymer and spodumene. Background technique [0002] Yuan Mingfen generally refers to sodium sulfate, also known as Glauber's salt. Sodium sulfate, an inorganic compound, sodium sulfate decahydrate is also known as Glauber's salt, and the high-purity, fine-grained anhydrous substance is called Yuanmingfen. Yuanmingfen is mainly used in the manufacture of water glass, glass, enamel, pulp, refrigeration mixture, detergent, desiccant, dye thinner, analytical chemical reagents, pharmaceuticals, feed, etc. At present, the main methods of producing sodium sulfate include beach field method, mechanical freezing method, comprehensive utilization method of salt lake, etc. [0003] The beach field method is to use the temperature changes in different seasons in nature to ...

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Problems solved by technology

[0007] The object of the present invention is to provide a method for preparing sodium sulfate based on a combination of salt lake ore, lithium polymer and spodumene, to solve the problem that existing preparation methods are difficult to produce high-quality and low-cost sodium sulfate

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